What added value would a Parliamentary Assembly provide to the existing UN system?

The members of the Parliamentary Assembly would group themselves by political affiliation rather than by national origin and thus would develop cross-border political identity. A more sophisticated global polity would emerge and mature. UN parliamentarians could be less considerate of diplomatic restraints, would be able to represent their constituents as well as the common interest of humanity and as independent representatives of the people could provide for better oversight of the UN’s activities.